Rubber

Rubber is a resource added by IC², and is used by a very large number of things (mostly for electrical insulation, but also other purposes).

Recipe

Rubber can be obtained two ways: smelting  Sticky Resin, or using an  Extractor (which is more efficient, and allows you to get rubber from  Rubber Sapling and  Rubber Wood too). Unfortunately, the Extractor takes rubber to make (and needs EU to run), so you're stuck with smelting in the beginning.

Via smelting:

Via extracting:

Uses

Rubber is used to insulate every type of cable except for  Glass Fibre Cable,  Splitter Cable, and  Detector Cable. Since insulated cables are used in a large number of IC² recipes (including the Splitter and Detector recipes!), it's not a bad idea to have a lot of rubber handy if you're building or expanding, or just in general. Rubber's great stuff.

Rubber on its own is also used to craft these delightful things^[2.6.133]:

•  Heat Conductor
•  Nightvision Goggles
•  Scuba Helmet
•  Hazmat Suit
•  Hazmat Suit Leggings
•  Rubber Boots
•  Rubber Sheet
•  Weeding Trowel
•  Rubber Dinghy

HAYO

You can use Rubber for crafting Cables or other stuff.

This is AWESOME!

Buy now this rubber! HAYO!